Installation manual
16
250C7Y1B
Split system air conditioner
4PW34720-1G – 07.2010
9.4.
Test operation
■
Check the stop valves
Make sure to open the gas and liquid line stop valves.
■
For details on test operation, refer to the indoor unit installation
manual.
Pre-run checks
1
Make sure the liquid and gas shut-off valves are open.
Be sure to close the frontside panel before operation, as not
doing so can cause electric shock.
-
The refrigerant pressure may not rise, even if the shut-off
valve is opened after an air purge is performed using a
vacuum pump.
This is because the indoor unit refrigerant piping is closed off
with electric valves inside. This will not create any problems
during operation.
2
To protect the compressor, make sure to turn on the power
supply 6 hours before starting operation.
Test operation from remote controller
1
Be sure to set it to cooling and press the operation switch.
2
Press the inspection/test-run switch on the remote control to put
the machine into test-run mode.
Test operation from outdoor PCB BS4 test button
3
Make sure to set the remote controller to fan mode, press the
button first and then press the operation switch.
4
Press the
button for 5 seconds (or longer when the
unit is at standstill). The test operation starts when the H2P LED
blinks and the remote controller indicates
(test operation).
5
Make sure the compressor is not starting and stopping during
the test-run by listening. If it is starting and stopping,
immediately stop the machine using the remote control, and
check the refrigerant level, etc. There may be some sort of
malfunction.
After the test operation (maximum 30 minutes), the unit automatically
stops. Check the operation results by the outdoor unit LED indication.
Defect judgement
Judgement can be done by HAP, H1P on the PCB (A1P) if the
power supply is turned on.
NOTE
After turning on the power supply, the unit cannot be
started until the H2P initialisation LED goes off
(maximum 12 minutes).
Items to check
Electrical wiring
Inter-unit wiring
Ground wire
■
Is the wiring as mentioned on the wiring
diagram?
Make sure no wiring has been forgotten
and that there are no missing phases or
reverse phases.
■
Is the unit properly grounded?
■
Are any of the wiring attachment screws
loose?
■
Is the insulation resistance at least 2 M
Ω
?
-
Use a 500 V mega-tester when
measuring insulation.
-
Do not use a mega-tester for circuits
which are not 230 V.
Refrigerant piping
■
Is the size of the piping appropriate?
■
Is the insulation material for the piping
attached securely?
Are both the liquid and gas pipes
insulated?
■
Are the shut-off valves for both the liquid
side and the gas side open?
Extra refrigerant
■
Did you write down the extra refrigerant
and the refrigerant piping length?
Opening direction
A
Liquid side
B
Gas side
Remove the cap and turn
counterclockwise with a
hex wrench until it stops
A
B
NOTE
When you want to terminate the test operation,
press the
button. The unit will keep
running for 30 seconds and then stops. During
test operation it is impossible to stop the unit with
the remote controller.
The test operation will automatically switch to
cooling mode for 3 minutes. The test opereation
will stop for 3 minutes and then switch to heating
when heating mode was selected (only during first
installation).
HAP
(green)
H1P
(orange)
Content
c
x
Normal
w
—
Outdoor PCB is defect (see NOTE 1)
x
—
Power supply abnormality or PCB is defect
(see NOTE 2)
c
w
Protection equipment is active (see NOTE 3)
NOTE
1
Turn the power off for more than 5 seconds.
Switch the power back on. If this was realized,
confirm your judgement.
2
Turn the power off for more than 5 seconds.
Disconnect the indoor-outdoor connection wire 3.
Switch the power back on for more than 10
seconds.
If the outdoor PCB HAP LED is blinking the indoor
PCB is not working correct.
3
Indication of a possible negative phase.
The abnormality detection continuously indicates the
past abnormal history untill power supply is shut off.
■
After the test operation is finished, check the indoor
units via the remote controller.
■
The LED indication changes during this operation, but
that is not abnormal.
■
Please attach the front plate of the oudoor unit in
order to prevent incorrect judgement during operation.
BS1 MODE
BS4 TEST
BS3 RETURN
